Cited by 200Polysaccharides Composition and ApplicationsProbiotics and Fermented FoodsMicrobial Metabolites in Food Biotechnology

NMR spectroscopic analysis of exopolysaccharides produced by Leuconostoc citreum and Weissella confusa

Maina, Ndegwa Henry, Tenkanen, Maija, Maaheimo, Hannu, Juvonen, Riikka, Virkki, Liisa·2008·Carbohydrate Research

Abstract

Dextrans are the main exopolysaccharides produced by Leuconostoc species. Other dextran-producing lactic acid bacteria include Streptococci, Lactobacilli, and Weissella species. Commercial production and structural analysis has focused mainly on dextrans from Leuconostoc species, particularly on Leuconostoc mesenteroides strains. In this study, we used NMR spectroscopy techniques to analyze the structures of dextrans produced by Leuconostoc citreum E497 and Weissella confusa E392. The dextrans were compared to that of L. mesenteroides B512F produced under the same conditions. Generally, W. confusa E392 showed better growth and produced more EPS than did L. citreum E497 and L. mesenteroides B512F. Both L. citreum E497 and W. confusa E392 produced a class 1 dextran. Dextran from L. citreum E497 contained about 11% alpha-(1-->2) and about 3.5% alpha-(1-->3)-linked branches whereas dextran from W. confusa E392 was linear with only a few (2.7%) alpha-(1-->3)-linked branches. Dextran from W. confusa E392 was found to be more linear than that of L. mesenteroides B512F, which, according to the present study, contained about 4.1% alpha-(1-->3)-linked branches. Functionality, whether physiological or technological, depends on the structure of the polysaccharide. Dextran from L. citreum E497 may be useful as a source of prebiotic gluco-oligosaccharides with alpha-(1-->2)-linked branches, whereas W. confusa E392 could be a suitable alternative to widely used L. mesenteroides B512F in the production of linear dextran.

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Crossref · 10.1016/j.carres.2008.04.012

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  • Leuconostoc metabolic pathways include conversion of citrate to diacetyl and acetoin, and production of dextrans from sucrose.

    “Other metabolic pathways include the conversion of citrate to diacetyl and acetoin, and the production of dextrans from sucrose [43,94].”

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Authors
Maina, N. H., Tenkanen, M., Maaheimo, H., Juvonen, R., & Virkki, L.
Affiliations
  • University of Helsinki (FI)
  • VTT Technical Research Centre of Finland (FI)
Corresponding author
Maina, Ndegwa Henry
Venue
Carbohydrate Research
Publisher
Elsevier BV
Published
2008-07
Volume
343
Issue
9
Pages
1446-1455
ISSN
0008-6215 (ISSN-L)
OpenAlex
W2088825024
Cited by
200
References
43
Citations by year
2026: 3 · 2025: 10 · 2024: 6 · 2023: 10 · 2022: 18 · 2021: 17 · 2020: 9 · 2019: 10 · 2018: 24 · 2017: 14 · 2016: 11 · 2015: 13 · 2014: 10 · 2013: 10 · 2012: 11
FWCI
12.82
Type
journal article
Language
en
Open access
closed
Locations
  • Carbohydrate Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
Tekes
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Polysaccharides Composition and Applications
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
  • Health Sciences › Nursing › Nutrition and Dietetics › Microbial Metabolites in Food Biotechnology
Keywords
dextran, exopolysaccharides, Leuconostoc citreum, Weissella confusa, Leuconostoc mesenteroides, lactic acid bacteria, dextran production
MeSH terms
Carbohydrate Sequence, Dextrans, Gram-Positive Bacteria, Leuconostoc, Molecular Sequence Data, Magnetic Resonance Spectroscopy, Polysaccharides, Bacterial, Molecular Structure

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